Circular saw



FIG. 1 is a perspective view of a circular saw showing my new design.

FIG. 2 is a left side view of a circular saw according to FIG. 1.

FIG. 3 is a right side view of a circular saw according to FIG. 1.

FIG. 4 is a front view of a circular saw according to FIG. 1.

FIG. 5 is a rear view of a circular saw according to FIG. 1.

FIG. 6 is a top view of a circular saw according to FIG. 1; and,

FIG. 7 is a bottom view of a circular saw according to FIG. 1.

The broken lines shown in the drawings form no part of the claimed design. 

The ornamental design for a circular saw, as shown and described. 